Refrigerator



FIG. 1 is a perspective view of a refrigerator in accordance with our design.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a right side thereof.

FIG. 5 is a left side view thereof; and,

FIG. 6 is a top view thereof.

The broken lines depict portions of the refrigerator that form no part of the claimed design. 

CLAIM The ornamental design for a refrigerator, as shown and described. 